@article{YJOR_2021_31_4_a6,
     author = {Sudipta Gayen and Sripati Jha and Manoranjan Kumar Singh and Ashish Kumar Prasad},
     title = {On {Anti-Fuzzy} {Subgroup}},
     journal = {Yugoslav journal of operations research},
     pages = {539 },
     publisher = {mathdoc},
     volume = {31},
     number = {4},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/YJOR_2021_31_4_a6/}
}